Azimuth scale with micrometer mechanism



April 10, 1928. 1,665,656

T, A. coNLoN AZIMUTH SCALE WITH MICROMETER MECHANISM Filed 0G13. 5, 1925 2 Sheets-Sheet l 'T1-Lamas A- Ecmlcm w, MMM

April 10,1928.

T. A. coNLoN AZIMUTH SCALE WITH MIGROMETER YlvlEGHANIsm Filed Oct'. 5, 1925 2 sheets-sheet Tha-nas A- Epnlnn M/w Patented Apr. 1o, 1928.

, '1,665,656 UNITED STATES P.A.T1:1\iT` oF'FlCE.

'THOMAS .-A. CONLON, OF.SILVER SPRING, MARYLAND.

AZIMUTH SCALE WITH :ii/rronoianrrzal MEGHANISM.

p Application @member 5,1925, serial No. 613,616.Y

(GRANTLDUNDEB THE PROVISIONS or'rrm'ncr erinnert s, isss, z2 sfr-AT. L ,ezm i The invention described herein may be "used by the Government, or any of' its oicers or employees in prosecutionof lwork-for Ythe Government, or by any Vother personinthe "United States, wit-hout payment to -me of any `royalty thereon, in yaccorda-'nce with the act 'of March c3, 1883. Y

The subject'of'thisinvention is an azimuth scale with micrometer mechanism. Y

When employing artillery lespecially against rap'idlymo'ving targets, it is essential for correct .training voffthe piece-'that the Areadings of the scale be accurate and that no unnecessary. "timey be lost in properly setting the scales; In the' present practice -of using the artillery mil as'the unit/of measurement the :azimuth scale of the ordinary mount maybe conveniently graduated from yOto 64,000 in increments of`100 mils.

The purpose of the present invention is to provide a micrometer mechanism-Which will permit' the Voperator to readily'and accurately set the -gun to single mils.

To these Vand other ends, the'invention consist-s in the construction, "arrangement, and combination' of velements 'described hereinafter and pointed out in'theclaims forming a part of this specification. l

A practical embodimentfof my'invention is illustrated in .the accompanying drawings,

wherein:

Fig. 1 is a longitudinal sectional view of a gun mount equipped with 'my vimproved mechanism;

Fig. 2 is a4 plan view thereof; and

Fig. 3 `is.a det-ail sectional view line 3-3 of Fig. 2. y

Referring tovthedrawings by'numerals of reference: i

I have shown a pedestal 5 having at its upper end a socket -6 adapted to receive a hemispherical housing 7 heldagainst rotation by studs 8 and equipped with a traversing ring gear 9. The housing through suitable bearings revolubly supports a top carriage 10 having a deck 11 and an apron 12. The top carriage is traversed by means of a pinion 13 mounted from said carriage and meshing with the stationary ring gear 9.

Encircling the housing 7 under the deck of the top carriage is a gear 14 clamped by means of two short plates 15-15 (Fig. 3) and screws 16 so as to normally remain stationary and being capable oit rotation during adjustment by merely loosening the window 18 located in the deck ofthe car" Bolted to the'deckis a. case 19 having la removable lcover20andl enclosing the ele- -ments of the micrometer mechanism. With- "in the case is a bearing 21 between which' and the bottom of the'case are journaledtthe elements' of a multiplying gear train .con-

sisting of a gear 22 and a pinion 23 which 'mesheswith the gear 14` on which theazimuth scale 17 is mounted. VThespindle22 of the gear 22 threadedly carries adial 24,

having planetary movement with respect to the scale 17, and graduated from 0 to 100 in single mils, the portion of thedial adjacent the azimuth lscale beingl visible `through 'the window 18 on which is engraved a reference or zero fline 25. Obviously, lthe azimuth :scale vcouldloe vmounted on a carriageso as to have planetary movement with respectfto the'dial and such' an arrangement-could be used with mounts having limited tra-verse where the traversing operator, who invsuch event would be stationary, would Atake up la position beyond the limits of traverse.

In order to provide for adjustmentof 'the azimuth scale 17 to suit `the circumstances of the mount or aiming point, the deck 'of the with which the screws 16-16 may be brought into register and unthreaded suii* carriage is formed withl la curved slot26 ciently to release the clamping action-'ofthe v` plates 15-15. The plates'are provided with holes 27 in which a pin not shown maybe inserted to lock the plates to the top carriage. When the dial case 19 is removed, the ring 17 bearing the azimuth scale maybe turned until the zero of the scale isA directly under the reference line 25 on the window. Thedial 24 may then be assembled so that its zero also coincides with the reference line. It it is 'desired to reset the azimuth scale with kthe dial case 19 in place, the plates 15-15 are adjusted as above to be rotated with the top carriage, the ring gear 14 being unclamped. A small socket wrench 28 is then applied through an aperture in the dial case cover 20 to the spindle 22 and the dial turned until the required scale division coincides with the reference line 25 after which the screws 16-16 areY again tightened.

los Y Since the dial and the scale are geared together they will be rotated in'unison when the ring 14 is unclamped.` The spring covers 29 and 30 are provided to respectively close the slot 26 in the deck of the carriage and the aperture in the cover 20.

While in the foregoing there has been illustrated and described such combination and arrangement of elements as constitute the preferred embodiment of the invention, it is nevertheless desired to emphasize the fact that interpretation of the invention should only be conclusive when made in the light of the subjoined claims.

I claim:

1. The combination with a gun mount, of a top carriage rotatably supported thereby, a pair of clamping plates on the mount, a gear retainedby said plates, an azimuth scale ring attached to said gear and graduated in increments of 100 mils, a Window including a reference line in the carriage through which a portion of said. scale is visible, acase secured to the carriage adjacent the window, a dial in said case graduated irom 0 to 100 in units of a single mil, a portion of the dial scale being visible Lthrough the window, av multiplying gear train carrying the dial and geared to the gear on the mount, and means whereby the clamping plates may be rotated with the carriage to provide for adjustmentot the azimuth scale With the dial case either removed or in place. i

2. The combination with a gun mount, of a top carriage rotatably supported thereby, a pair of clamping plates on the mount, a gear retained by said plates, an azimuth scale ring ,attachedy to said gear and graduated in increments of 100 mils, a Window including a reference line in the carriage through which a portion of said scale is visible,\a case secured to the carriage adjacent the Window, a dial in said case graduated from 0 to 100 in units of a single mil, a ,portion of the dial scale being visible through the Window, a multiplying gear train carrying the dial and geared to the gear on the mount, and means whereby the azimuth scale may be adjusted with respect to the reference line. i

3. The combination with a gun mount, of

a top carriage rotatably supported thereby, a pair of clamping plates on the mount, a gear retained by said plates, an azimuth scale ring attached tok said gear and graduated in increments of 100 mils, a window including a reference line in the carriage through which a portion of said scale is visible, a case secured to the` carriage adjac-ent the window, a dial in said case graduated from O to 100 in units of a single mil, a portion of the dial scale being visible through the Window, and a multiplying gear train carrying the dial and geared to the gear on the mount.

lLY-The combinationwith a gun mount, of a top'carriage rotatably supported thereby, a gear normally fast on the mount but capable of independent rota-tion Without, detachment, said gear including a graduated azimuth scale at least a portion of which is visible, a reference on thecarriage against which the scale may be read, a case secured to the carriage, a dial mounted in said case to be adjacent Athe azimuth scale and graduated in divisions of the'unit of said scale,

and a multiplying gear train carrying `the dial and geared to the azimuth scaley gear, and means whereby the azimuth scale gear may be adjusted with respect'to the reference. v

5; The combination with a gun mount, of

a top carriage rotatably supported thereby, a gear carried by the mount, said gear including a graduated azimuth scale at least a portion of which is visible, a reference on the carriage against Awhich the scale may be read, a case secured to the carriage, a dial mounted in said ease to be adjacent the azimuth scale and graduated in divisions ot the unit of said scale, and a multiplying gear train carrying the dial and lgeared to the azimuth scale gear. Y

6. Thecombination with a gun mount, of a top carriage rotatably supported thereby, a graduated azimuth scale carried by the mount, a-dial carried by the' top carriage and graduated in divisions of unit of the scale, a multiplying gear train connecting the Adial and the scale, and a reference against which sca-le and dial map be read.

Trios. A. coNLoN. 

